Well, the chart is one thing, but Bob's diary is another thing. Before hypertext, the Choose Your Own Adventure books were doing multiple endings as early as 1979 (which may have been based off the 1970 play Accidental Death of an Anarchist--and it probably goes back further than that, but that was just from a quick Wikipedia search. Charles' Dickens A Christmas Carol is another, much older example in which Scrooge sees his death as a possibility--and chooses otherwise. Granted, even this surely can't be the first example of such a narrative technique... History tends to repeat itself, which is why I question anyone who claims to have done something first/originally.

it's 2am. i'm a bit high. been drinking lamb's blood all night, jacking off to richard simmons fat people infomercials, smoking my own pubic hair. so i might say things that offend. please fogive me, for I know not what you do._________________combing my pube 'fro